Injector



(Model.)

W. B. MACK.

Y INJEGTOR. No. 457,515.

. Il Y m fg/@ Patented Aug. 1v1, 1891.

NVEN-rnw ff mf l Y wlw-NESSS UNITED STATES PATENT OFFICE.l

lVILIIIAM B. HACK, OF BCSTON, MASSACHUSETTS.

INJECTOR.

SPECIFICATION forming part of Letters Patent No. 457,515, dated August 11, 1891.

Application led March 18,1891. Serial No. 385,493. (Model.)

To @ZZ whom, it may concern:

Be it known that I, WILLIAM B. MACK, of

Boston, in the count-y of Suffolk and State ofa This invention has for its object to provide improved means for securing the steam-cone of an injector to the casing thereof in suitable relation to the combining-cone in such man ner that the said steam-cone shall be readilydetached without the necessity of unscrewing it from the casing.

To this end the invention consists in the improvements which I will now proceed to describe and claim.

Of the accompanying drawings, forming a part of this specification, Figure l represents a longitudinal section of an injector provided with my improvements. Fig. 2 represents a perspective view of the device which holds the steam-cone in its place; and Fig. 3 represents a side view of the steanrccne and its holding device removed from the casing.

The saine letters of reference indicate the saine parts in all of the gures.

In the drawings, a represents the casing of an injector, b represents the steam-cone, and c represents the combining-cone, the arrangement of said parts being the same as in the well-known Mack injector, manufactured by the National Tube lVoI-ks Company, of VBoston, Massachusetts, and forming no part of my present invention, which relates entirely to the means for securing the steam-cone.

In carrying out my invention I provide the forward or larger end of the steam-cone with an outwardly-projecting flange or shoulder b', which bears against a corresponding shoulder a. on the casing and limits the movement of the steam-cone toward the combining-cone. I also provide the steam-cone with a circular enlargement b2, adjoining said shoulder, the said enlargement havinga plain or unthreaded periphery which ts the corresponding surface of a seat a2, formed in the casing for the reception of said enlargement. The unthreaded enlargement 192 is substituted for the usual external screw-threaded enlargement formed on the steam-cone and enables the steam-cone to be readily inserted and removed without rotating it, or, in other Words, without screwing it into and out of the casing.

To preventendwise movement of the cone b away from the combining-cone and from l device is provided with a shoulder 5,between 6 which and the innerend of the terminal gis interposed an elastic Washer or packing 6. It will be seen that when the terminal g is moved to its place on the casing by means of the attaching-screws g said terminal u ill press the holding device or spider e firmly against the outer end of the steam-cone, and thus retain the latter in its operative position.' Vhen it is desired to remove the steam-cone, this operation may be readily eiected by re1noving the terminal g, the spider or holding device e being thus released, so that the steam cone may be readily withdrawn. The packing 6, interposed between the terminal g and the shoulder on the spider or holding device, enables the said spider to be forced to its operative position with a somewhat yielding pressure, so that the terminal g cannot be screwed up so closely as to bear injuriously on said cage.

I claim The casing having the`combining-cone, the internal shoulder a', and the detachable terminal g, combined with the steam-cone having a shoulder b and a smooth enlargement 9ob2, and the steam-cone holder composed of the sleeve 4, fitted in a socket in the terminal g, and the spider bearing against the outer end of the steam-cone, as set forth.

In testimony whereof I have signed my 95 name to this specification, in the presence of two subscribing witnesses, this 16th day of 

